Music-leaf turner.



F. HOFMANN, MUSIC LEAF TURNER.

APPLICATION FILED NOV. 12, 1912.

Patented 0013.28, 1913.

Z SHEETS-SHEET 1.

COLUMBIA PLANOGRAPH CUHWASHXNGTON. D. :4

P. HOPMANN. I

MUSIC LEAF TURNER.

- APPLICATION FILED NOV. 12, 1912. Patented 0013. 28, 1913.

2 SHEETS-SHEET 2.

FRITZ HOFMANN, OF WEST HOBOKEN, NEW JERSEY.

MUSIC-LEAF TURNER.

Application filed November 12, 1912.

To all whom it may concern Be it known that I, Fnrrz HOFMANN, a citizen of the United States, residing at West Ho boken, in the county of Hudson, State of New Jersey, have invented certain new and useful Improvements in Music- Leaf Turners; and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will en able other skilled in the art to which it appertains to make and use the same.

This invention relates to improvements in music leaf turners, and particularly to a device for attachment to a piano or organ rack or to the ordinary folding music stand.

The principal object of this invention is to provide a simple device of this character which will eflectively turn the leaves, as the leaf turning arm is moved out of position.

Another object is to provide simple means for releasing the leaf turning member.

Another object is to provide simple means for resetting the arm.

Other objects and advantages will be apparent from the following description and with particular reference to the accompanying drawings.

In the drawings: Figure 1 is an elevation of a music leaf turner made in accordance with my invention and partly broken away, Fig. 2 is a top plan view, Fig. 3 is a side elevation, Fig. d is a rear elevation, Fig. 5 is a sectional view on the line 55 of Fig. 2, Fig. 6 is a vertical section on the line 66 of Fig. 4;, Fig. 7 is an enlarged detail view of the releasing means for the leaf turning members, and Fig. 8 is an enlarged detail of the means for releasing the strips so that the arms can be reset.

Referring particularly to the accompanying drawings, 10 represents a flat base which is in disk form and slightly more than a half circle, said disk being bent downwardly at one end as indicated at 12, an arcuate slot 13 being formed near its outer curved edge, and extending in parallel relation with the said curved edge. Secured to the lower side of the base, and near the rear flat edge portion is a depending tubular member l t, this tubular member 14 being formed with a bayonet slot 15 in one side, which has a shoulder 16 and a bayonet slot 17 in its opposite side which has the recessed end portion 18. Extending above the plate, and at a point which is the center from which Specification of Letters Patent.

of the next plate.

Patented Oct. 28, 1913.

Serial No. 730,910.

the slot 13 is described, is a pivot pin 19, and on this pin is arranged a vertical superposed series of flat metal plates 20. Between each pair of the plates 20 is a spring 22 having one end attached to the pivot pin and the other end engaging with a projection 23 formed on each of the plates, where by the plates will be moved on the pivot pin when released by the mechanism which will be described later. At the rear of each of the plates 20 and formed integrally therewith is an upturned perforated lug 24 and to each of these lugs is pivotally connected one end of a leaf turning arm 25. This arm has an enlargement 26 on its lower edge and near the pivot to which is pivo-tally connected the upper end of a link 27, the opposite end of the link being formed with a reduced neck portion 28, slidably engaged in the slot 13, the head 29 engaging below the said plate, and the shoulders 30 hearing on the upper edge of the plate to support the arm.

Extending rearwardly near the approximate center of the rear edge of the base plate 10 is an arm 31 having an upturned end 32, adapted to be engaged by the hooked end 33 of the rearwardly extending spring arm 34 secured to the lowermost plate of the series. Each of the other plates has a similar spring arm 34 provided with a downturned end portion 33 for engagement over the corresponding portion of the spring arm Thus the spring arms 34 are graduated in length from the bottom toward the top, the bottom one being the shortest and the top one being the longest. Each of the arms 3 L projects slightly beyond the one below. Adjacent to the arm 34 on each of the plates 20 is a projection 35, which is adapted to be engaged by the in turned upper end 36 of the release bar 37.

he upper end of this bar is cutaway as at 38 to provide a shoulder 39, to engage under each of the downturned portions 33 of the spring arms 84:.

Pivotally connected at the lower end of the tubular member 14 is an operating thumb lever 40, in the inner end of said lever being formed a vertical slot 41, which receives the transverse pin 42 carried by the lower end of a vertically disposed reciprocating bar 43. Near the upper end of this bar is a transversely arranged lever 44: having the longitudinal slot which receives herethrough a pin d6 carried near the upper end of the said bar 43, the forward end of said arm &4 extending through an opening 17 in the forward portion of the tubular member 14- and forming a fulcrum for said arm t-ft. To the rear end of said arm 4A is pivotally connected the before-mentioned vertical bar 37 which releases the spring arms 3% in a manner before described.

A spring L9 is connected at its opposite ends respectively to the said bar 37 and to the said bar 43 and has a tendency to normally hold or draw the arm 37 toward the rear sides of the plates 20, so that as each one is released by the raising of the arm 3-1, this arm 37 will be drawn inwardly so that its inturned upper end 36 will drop on to the next lower projection 35 and its shoulder 39 be engaged below the downturned end 33 of the next spring arm 34 below. A coil spring 50 is mounted on the bar 413 and has a tendency to draw down on the arm or lever 14.

The bar 37 projects through the beforementioned bayonet slot 15 and a thumb piece 51 is secured to the said bar 43, and projects through the bayonet slot 17.

In the operation of the device, the parts being in the position as shown in Fig. 1, when it is desired to turn a leaf, the thumb-lever 4:0 is depressed, to cause the outer end 41 to engage the pin 12 and raise the bar 13 so that the lever 44 will be rocked to lift the lever 37 and raise the uppermost of the spring arms 34: from engagement with the one below. The spring 22 then causes the said plate 20 to swing around on its pivot pin and turn the leaf to the opposite side of the rack. When the thumb lever a0 is released, the spring 50 draws down on the arm or lever l-t and pulls the bar 37 downward and at the same time the spring a9 draws the bar 37 inwardly so that the upper inturned end 36 will be drawn inwardly and engage over the extension 35. As each of the arms 25 moves with the plate 20, the link rides in the groove 13, and as the link passes downwardly in the inclined portion 12, the arm will gradually be lowered so as to be below the music on the page. This operation is repeated to successively release each of the other leaf turning arms. When it is desired to reset the arms, the bar 43 is raised by means of the thumb-piece 51 into the horizontal portion of the slot 17. This holds the inturned end 36 of the bar 37 above the uppermost of the projections 35 so that they may all be turned to their original positions, after which the portion of the bar 43 which carries the thumb-piece 51 is reseated in the deeper recess 18 of the slot 17, and the inwardly projecting upper end '36 permitted to rest on the projection 35 of the top plate 20.

lVhat is claimed is:

1. In a music leaf turner, a tubular support, a pivot rod in the support, a plurality of superposed plates carried by the rod, pivoted spring actuated leaf engaging arms carried by the plates, projections on the plates, a plate on the support having an upturned end, outwardly extending hook shaped spring arms on the plates, the lowermost of the spring arms engaging the upturned end of said plate, each of the other spring arms engaging the next lower spring arm, and a vertically reciprocable spring held bar ha ing a shouldered portion to receive the spring arms successively, the up aer end of the bar having an offset portion for engagement on the projections of the plates successively.

2. In a music leaf turner, a support, a vertical pivot pin in the support, a track having a curved slot eccentric with the pivot pin, one end of the track being downwardly inclined, a plurality of superposed plates mounted on the pivot pin, springs for turning the plates on the pivot pin, detents for holding the plates in one position, means for successively releasing the detents, leaf turning arms pivotally carried by the plates, and a plurality of vertically disposed links each pivoted at its upper end to one of the leaf arms, the lower end of the link having a re duced neck portion disposed in the said slot and a head portion engaging the track beneath the slot.

In testimony whereof, I aiiix my signature, in the presence of two witnesses.

FRITZ HOFMANN.

Witnesses CHARLES Fmnnns'ron'r, Josnr FRIEB.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents, Washington, D. G. 

